Working Days Between Dates Calculator

Updated August 2026 · Free · No sign-up

Count the working days between two dates, automatically excluding weekends — with an option to subtract public holidays. Built for project planning, notice periods, payroll cycles, and legal deadlines.

How Working Days Are Counted

Working Days = Total Calendar Days − Weekend Days − Public Holidays

This calculator treats Saturday and Sunday as non-working (the standard 5-day week) and counts every weekday in your range. Enter the number of public holidays falling on weekdays within the range to subtract them — holiday calendars differ by country and even by state, so you supply the count that applies to you.

The inclusive/exclusive choice matters: payroll and leave calculations usually count both endpoints ("June 1 to June 5" = 5 days), while durations and deadlines often exclude the start ("5 days from Monday" ends Saturday). Pick the convention your contract or policy uses.

Worked Examples

Example 1 — a full month. Monday June 1 to Tuesday June 30, inclusive: 30 total days − 8 weekend days = 22 working days; subtract one mid-month holiday → 21.

Example 2 — notice period reality. A 90-calendar-day notice served from March 10 spans roughly 26 weekend days and 2–3 holidays: about 62 actual office days for handover — which is why 90 days feels shorter than it sounds. Compute your exact end date first with the notice period calculator.

Example 3 — payroll proration. An employee joining August 18 works 10 of the month's 21 working days: salary × 10/21 gives the prorated month — the standard joining-month calculation.

Average Working Days Quick Reference

Business Days in Contracts and Law

Legal drafting distinguishes sharply between "days" (calendar) and "business days". Consequences worth knowing: statutory deadlines that land on weekends usually roll to the next business day; "10 business days to respond" from a Friday notice ends two full weeks later; and cross-border contracts should define whose business days apply (a US–India agreement has different holiday sets on each side). When a contract just says "days", courts overwhelmingly read calendar days — assume the stricter reading and diary accordingly with the deadline calculator, which adds days to a date in either mode.

HR Uses of Working-Day Counts

• Salary proration: joining/leaving mid-month pays (days worked ÷ month's working days) × salary — some employers use calendar days instead, which changes the result; check your policy.
• Leave accounting: leave policies deduct working days, so a Friday-to-Monday trip costs 2 days, not 4 — but "sandwich leave" policies in India may count the weekend if you take both adjacent days. Know yours before booking (and check your balance in the leave balance calculator).
• Probation and notice: these run in calendar days, but planning handovers needs the working-day count — the two views of the same period differ by ~30%.
• Payroll cycles: per-day rates for loss-of-pay deductions commonly divide by working days (or by 30, in India) — a meaningful difference on a 20-working-day month.

Weekend Patterns That Change the Math

This calculator assumes Saturday–Sunday weekends. Variations to adjust for manually: 6-day weeks (common in Indian retail/manufacturing — only Sundays off, so add Saturdays back), Friday–Saturday weekends (much of the Middle East), and alternating Saturdays (many Indian offices work 1st/3rd Saturdays). For a 6-day week, take the calculator's result and add the number of Saturdays in your range.

Planning Tip: Working Days Shrink Under Load

Project managers quietly discount working-day counts by 10–20% for real capacity: meetings, on-call rotations, and partial days consume weekday time that a calendar count treats as fully available. A "22 working day" month is typically 18–20 productive days per person. For per-person capacity, multiply available days by hours with the work hours calculator, and convert team headcount honestly using the FTE calculator.

✓ Formula verified  •  Last updated: August 20, 2026